ftp.nice.ch/pub/next/games/fun/Guess.NIHS.bs.tar.gz#/Guess/Source/Guesser.h

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/* Simple Sound Demo Program */

#import <objc/Object.h>
#import <appkit/appkit.h>
#import <soundkit/Sound.h>

@interface Guesser:Object
{
    int	real_num;
    
    id	too_low;
    id	too_high;
    id	just_right;
    id	instructions;
    
    id	input_textfield;
}

+ new;
- setInput_textfield:anObject;
- newGame:sender;
- guess:sender;

@end

These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Marcel Waldvogel and Netfuture.ch.